Brake



Aug. 16, 1938. V E. HODGES 2,127,030

BRAKE Filed June 10, 1957 2 Sheets-Sheet l Patented Aug. 16, 1938 v i 2,127,030

UNITED STATES PATENT orrics BRAKE Lester E. Hodges, Houston, T'ex., assignor to Portable Rig Company, Houston, Tex., a corporation of Texas Application June 10, 1937, Serial No. 147,532 8 Claims. (01. 188-264) This invention relates to brake mechanism and .whose ends are countersunk into the yokes and has particular relation to a novel type of brake the corresponding extensions 511. These packband of such construction that a cooling fluid ing rings surround the corresponding ducts 8. may be readily circulated therethrough. On the respective yokes are the leaf-springs An object of the invention is to provide in a H] whose ends are slotted, as shown in Figure 3. 5 brake band, a series of hollow sections flexibly Bolts II have their inner ends screwed into the connected together with novel means for concorresponding extensions 5a and these bolts are necting the sections, said connecting means havfitted through bearings inthe corresponding yoke ing fluid conduits through which the cooling fluid 7 and through the end slots of the leaf-springs 10 may flow from section to section throughout Ill. The ends of-the leaf-springs I 0 are normally 0 the band. outwardly curved as indicated in dotted lines in It is another object of the invention to provide Figure 2. When assembled the nuts l2 screwed novel connections between thehollow brake band on to the outer ends" of the bolts II will force sections which will be fluid tight and which will the springs l0 into close contact with the yokes,

be readily accessible for installation or removal. throughout the length of the springs, as shown 15 With the above and other objects in view the in full lines in Figure 2, when said nuts are invention has particular relation to certain novel screwed home, thus holding the yokes firmly features of construction, arrangement of parts against the packing rings to-form close fitting and use, an example of which is given in this joints. This construction will allow sufficient 2Q specification and illustrated in the accompanyflexibility to the brake band to permit it to be ing drawings, wherein:- set and released without resistance.

Figure 1 shows an end view of the brake drum An inlet line I3 leads into the chamber of one showing the brake band and the band operating of the end sections of the brake band and an mechanism, said operating mechanism being outlet I4 leads out from the chamber of the shown in section. other end section of the band. A cooling fluid 2 Figure 2is a plan view, partly in section, showmay thus be circulated throughout the brake 5 ing the connected hollow brake band sections, band to keep the same cool. and The means for setting and releasing the brake Figure 3 shows a fragmentary, edge view is substantially the same as that shown in my thereof. Patent No. 1,992,484 issued February 26, 1935, 30

Referring now more particularly to the drawthis mechanism for setting and releasing the ings, wherein like numerals of reference desigbrake, however, forming no part of the present nate the same parts in each of the figures, the invention. As shown there is a track I5 with a numeral I designates the brake drum which is yoke I 6 fixed thereon and connected to one end mounted on the drum shaft 2. Surrounding the of the band. On this track there is a slidable 35 brake surface of the drum there is a brake band yoke I! connected to the other end of the band which is designated as a whole by the numeral 3. through a link The y ke "5 may be manip- This band includes an inner lining 4 which is ulated through the brake rod l9 whose outer formed of suitable material for the purpose such end is connected to the brake arm 20 which is 40 as asbestos and around this lining there is the fixed Oh the v ntional brake shaft 2|. 40 series of hollow sections 5 formed of metal and A brake mechanism of the character described cast hollow providing the internal chambers 6. is specially adapted for use on draw-works drums Surrounding the sections 5 there is the metallic r u in W ll r ll n p rations to control the band I to which said sections may be secured in load being let down into, and W t drawn from,

any suitable manner preferably by set screws. Wells and in use the friction will generate great 45 The adjacent ends of the respective sections are heat and for that reason means have been proinwardly shouldered, as shown in Figure 2 pro- Vided for circulating a coolingfluid throughout viding the hollow extensions 5a, 5a and fitted to the brake bend to reduce the p turethese extensions are the yokes 1. These exten- However, this type of brake band is adaptable sions and the corresponding yokes have the ducts f r u e generally Where heavy duty is q e 50 8 therethrough connecting the chamber 6 of one The drawings a d p n 1 86 086 What is section with the chamber 6 of the adjacent secnow considered to be a preferred form of the tion. The joints between each yoke and the invention by way of illustration only, while the corresponding sections are rendered fluid tight broad principle of the invention will be defined by means of the sleeve-like packing rings 9, 9 by the appended claims. 55

What I claim is:-

1. A brake band having a series of hollow sections therein, rigid yokes connecting adjacent sections and having ducts therethrough for the circulation of a cooling fluid from section to section and means for connecting the yokes to adjacent sections.

2. A brake band having sections therein connected together and provided with internal chambers for a cooling fluid, means connecting said sections, said means including yokes formed of rigid material and connected to adjacent sec tions, said connecting means having ducts therethrough providing for the circulation of a cooling fluid from chamber to chamber of said sections.

3. A brake band having sections therein connected together and provided with internal chambers for a cooling fluid, means connecting said sections, said means including rigid yokes connected to adjacent sections, said connecting means having ducts therethrough providing for the circulation of a cooling fluid from chamber to chamber of said sections and packing rings forming fluid tight joints between the yokes and the sections connected thereby.

4. In a brake band including a series of sections flexibly connected together and containing circulating chambers for cooling fluid, means connecting said sections together, said connecting means having ducts therethrough for the circulation of the fluid from chamber to chamber, said connecting means comprising rigid yokes and means pivotally connecting the yokes to adjacent ends of the connected sections.

5. In a brake band adjacent sections having chambers therein for cooling fluid, the adjacent ends of the sections having extensions, a rigid connecting yoke, means for pivotally connecting the respective ends of the yoke to the corresponding extensions, said yoke and extensions having a duct leading therethrough and connecting the chambers of said sections.

6. In a brake band adjacent sections each having a chamber therein for cooling fluid, connecting means for connecting said sections, said connecting means having a duct through which said fluid may circulate from one chamber to the other chamber, said connecting means comprising a yoke, a pressure spring on the yoke, means passing through the spring and yoke and connected to the respective sections for securing the spring and yoke assembled with the sections.

7. In a brake band adjacent sections each having a chamber therein for cooling fluid, means connecting the sections together, said connecting means having a duct therethrough leading from one chamber to the other chamber, said connecting means comprising a yoke, sealing means between the yoke and the respective sections, a spring pressing against the yoke, securing means extended through the spring and yoke and connected to the sections for maintaining the assembly in assembled relation.

8. In a brake band adjacent sections having chambers therein for cooling fluid, the adjacent ends of the respective sections being reduced in width providing hollow extensions narrower in width than the main body of the sections, a connecting yoke, means for connecting the respective ends of the yoke to the corresponding extensions, said yoke and extensions having a duct leading therethrough for connecting the chambers of the sections.

LESTER E. I-IODGES. 

